Discharge lamp drive device, light source device, projector, and discharge lamp drive method

Abstract

A discharge lamp drive device includes a discharge lamp driver adapted to supply a drive current to a discharge lamp, a control section adapted to control the discharge lamp driver, and a storage section adapted to store a plurality of drive patterns of the drive current. Each of the drive patterns has a plurality of drive parameters. The plurality of drive patterns includes a first drive pattern and a second drive pattern different from each other in a value of at least one of the plurality of drive parameters. The control section is configured to execute the first drive pattern and the second drive pattern in accordance with at least one of accumulated lighting time of the discharge lamp and an individual of the discharge lamp in a case in which an inter-electrode voltage of the discharge lamp is at a predetermined voltage value.

What is claimed is: 
     
       1. A discharge lamp drive device comprising:
 a discharge lamp driver adapted to supply a drive current to a discharge lamp having a first electrode and a second electrode; 
 a control section adapted to control the discharge lamp driver; and 
 a storage section adapted to store a plurality of drive patterns of the drive current, 
 wherein each of the drive patterns has a plurality of drive parameters, 
 wherein the plurality of drive patterns includes a first drive pattern and a second drive pattern different from each other in a value of at least one of the plurality of drive parameters, and 
 wherein the control section is configured to execute the first drive pattern and the second drive pattern in accordance with at least one of accumulated lighting time of the discharge lamp and an individual of the discharge lamp in a case in which an inter-electrode voltage of the discharge lamp is at a predetermined voltage value. 
 
     
     
       2. The discharge lamp drive device according to  claim 1 ,
 wherein the control section is configured to select one drive pattern of the plurality of drive patterns based on machine learning, and execute the selected drive pattern. 
 
     
     
       3. The discharge lamp drive device according to  claim 1 ,
 wherein in an execution period in which the first drive pattern and the second drive pattern are each executed at least one or more times, a proportion of execution time during which the first drive pattern is executed to a length of the execution period and a proportion of execution time during which the second drive pattern is executed to the length of the execution period are different from each other. 
 
     
     
       4. The discharge lamp drive device according to  claim 1 ,
 wherein in an execution period in which the first drive pattern and the second drive pattern are each executed at least one or more times, the number of times that the first drive pattern is executed and the number of times that the second drive pattern is executed are different from each other. 
 
     
     
       5. The discharge lamp drive device according to  claim 1 ,
 wherein in a case in which the inter-electrode voltage is at a predetermined voltage value, a probability that the first drive pattern is executed and a probability that the second drive pattern is executed are different from each other. 
 
     
     
       6. The discharge lamp drive device according to  claim 1 ,
 wherein the control section is configured to execute
 the first drive pattern in a case in which the inter-electrode voltage is at the predetermined voltage value and the accumulated lighting time is equal to a first accumulated lighting time, and 
 the second drive pattern in a case in which the inter-electrode voltage is at the predetermined voltage value and the accumulated lighting time is equal to a second accumulated lighting time different from the first accumulated lighting time. 
 
 
     
     
       7. The discharge lamp drive device according to  claim 1 ,
 wherein the control section is configured to execute
 the first drive pattern in a case in which the inter-electrode voltage is at the predetermined voltage value and the discharge lamp is a first discharge lamp, and 
 the second drive pattern in a case in which the inter-electrode voltage is at the predetermined voltage value and the discharge lamp is a second discharge lamp different from the first discharge lamp. 
 
 
     
     
       8. The discharge lamp drive device according to  claim 1 ,
 wherein the number of the drive patterns is no less than 20 and no more than 30. 
 
     
     
       9. A projector comprising:
 a discharge lamp adapted to emit light; and 
 the discharge lamp drive device according to  claim 1 ; 
 a light modulation device adapted to modulate light emitted from the discharge lamp in accordance with an image signal; and 
 a projection optical system adapted to project the light modulated by the light modulation device. 
 
     
     
       10. A projector comprising:
 a discharge lamp adapted to emit light; and 
 the discharge lamp drive device according to  claim 2 ; 
 a light modulation device adapted to modulate light emitted from the discharge lamp in accordance with an image signal; and 
 a projection optical system adapted to project the light modulated by the light modulation device. 
 
     
     
       11. A projector comprising:
 a discharge lamp adapted to emit light; and 
 the discharge lamp drive device according to  claim 3 ; 
 a light modulation device adapted to modulate light emitted from the discharge lamp in accordance with an image signal; and 
 a projection optical system adapted to project the light modulated by the light modulation device. 
 
     
     
       12. A projector comprising:
 a discharge lamp adapted to emit light; and 
 the discharge lamp drive device according to  claim 4 ; 
 a light modulation device adapted to modulate light emitted from the discharge lamp in accordance with an image signal; and 
 a projection optical system adapted to project the light modulated by the light modulation device. 
 
     
     
       13. A projector comprising:
 a discharge lamp adapted to emit light; and 
 the discharge lamp drive device according to  claim 5 ; 
 a light modulation device adapted to modulate light emitted from the discharge lamp in accordance with an image signal; and 
 a projection optical system adapted to project the light modulated by the light modulation device. 
 
     
     
       14. A projector comprising:
 a discharge lamp adapted to emit light; and 
 the discharge lamp drive device according to  claim 6 ; 
 a light modulation device adapted to modulate light emitted from the discharge lamp in accordance with an image signal; and 
 a projection optical system adapted to project the light modulated by the light modulation device. 
 
     
     
       15. A projector comprising:
 a discharge lamp adapted to emit light; and 
 the discharge lamp drive device according to  claim 7 ; 
 a light modulation device adapted to modulate light emitted from the discharge lamp in accordance with an image signal; and 
 a projection optical system adapted to project the light modulated by the light modulation device. 
 
     
     
       16. A projector comprising:
 a discharge lamp adapted to emit light; and 
 the discharge lamp drive device according to  claim 8 ; 
 a light modulation device adapted to modulate light emitted from the discharge lamp in accordance with an image signal; and 
 a projection optical system adapted to project the light modulated by the light modulation device. 
 
     
     
       17. A discharge lamp drive method adapted to supply a drive current to a discharge lamp having a first electrode and a second electrode to drive the discharge lamp, the method comprising:
 supplying the drive current to the discharge lamp in accordance with a plurality of drive patterns of the drive current, the plurality of drive patterns each having a plurality of drive parameters, the plurality of drive patterns including a first drive pattern and a second drive pattern different from each other in a value of at least one of the plurality of drive parameters; and 
 executing the first drive pattern and the second drive pattern in accordance with at least one of accumulated lighting time of the discharge lamp and an individual of the discharge lamp in a case in which an inter-electrode voltage of the discharge lamp is at a predetermined voltage value.